Java: Test if a double number is an integer

Last update on May 15 2025 13:08:40 (UTC/GMT +8 hours)

Check if Double is Integer

Write a Java program to test if a double number is an integer.

Sample Solution:

Java Code:

import java.util.*;
public class Example3 {
 public static void main(String[] args) {
  double d_num = 5.44444;
  if ((d_num % 1) == 0) {
   System.out.println("It's not a double number");
  } else {
   System.out.println("It's a double number");
  }
 }
}

Sample Output:

It's a double number

Flowchart:

$Flowchart: Test if a double number is an integer.$

For more Practice: Solve these Related Problems:

Write a Java program to determine if a double is an integer by comparing its floor and ceiling values.
Write a Java program to check if a double value equals its casted int value using type conversion.
Write a Java program to verify integer status of a double using modulo operations and custom tolerance.
Write a Java program to determine if a double is an integer by leveraging BigDecimal's scale and precision.

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Java Code Editor:

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